Question

Value of heat of fusion of \[NaCl\] is
(a) Very low
(b) Very high
(c) Not very low and not very high
(d) None of the above

Answer 1

Hint: To convert ice to water, a specific amount of heat is needed which depends upon the heat of fusion of the ice and the amount of water available.

Complete Step by Step Solution:
The heat of fusion or the specific latent heat is the amount of heat that provides the energy to one gram of solid material and converts it into a liquid phase at its melting point at constant pressure.
For example, the heat of fusion of water is 80 calories per gram i.e it required 80 calories of heat to one gram of ice at the temperature of \[{0^ \circ }C\]into its liquid phase at \[{0^ \circ }C\].
The value of heat of fusion varies from substance to substance.
ΔH_f = q.m; where, ΔH_f = Heat of Fusion, q = Heat Energy, m = mass.

The application of heat of fusion can be easily observed around us in everyday life. Various products have been designed by using the heat of fusion method.
The conversion of ice into water is an easy example of the heat of fusion.
Besides this, the heat of fusion method can also be used in coin production, glassblowing, polymer production.

The American pennies are produced by heating the copper and zinc metals in the catting furnace at a very high temperature until they are converted into the liquid phase.
In the case of salts such as., \[NaCl\]the constituent ions are bonded to each other by the very strong force of attraction and these constituent particles have FCC arrangement. Therefore, the \[NaCl\] has a very high heat of fusion

The metal salt has higher heat of fusion than the metals.
Hence, the above statements indicate the option (b) will be the correct answer.

Note: The heat of fusion of \[NaCl\] is 26.03 kJmol. \[NaCl\]is the most abundant mineral on the earth’s crust and also an important nutrient for various plants and animals.